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ARP Recommend pulling a bolt to 75% of a yield in which case an ARP 2000 is around 110 foot pound in an M12 bolt which is fine but the 625 pulls 140 foot pound at 75% of yield and because you’re not tensioning the bolt to 140 foot pound both bolts perform exactly the sameIn this application spending the extra thousand dollars on the 625 bolts is a complete and utter waste of money and there is zero benefit
\n105lb seat pressure at 39
Plumb Back or Dual Port
the more detonation becomes critical as it has no place to go but into the rods
Liquid Cooled
Toyota 1GR-FE Valve Spring Set KVS01-24 TS02081113 ARP Recommend pulling a boltTOYOTA 1GR FE . Kelford Racing, High performance PACALOY valve spring set for turbocharged and supercharged 1GR FE engines.